diff --git a/configure.py b/configure.py
index a0676855..301b887a 100644
--- a/configure.py
+++ b/configure.py
@@ -1216,7 +1216,7 @@ config.libs = [
             Object(Matching, "JSystem/JParticle/JPAChildShape.cpp"),
             Object(Matching, "JSystem/JParticle/JPAExTexShape.cpp"),
             Object(Matching, "JSystem/JParticle/JPADynamicsBlock.cpp"),
-            Object(NonMatching, "JSystem/JParticle/JPAFieldBlock.cpp"),
+            Object(Matching, "JSystem/JParticle/JPAFieldBlock.cpp"),
             Object(Matching, "JSystem/JParticle/JPAKeyBlock.cpp"),
             Object(Matching, "JSystem/JParticle/JPATexture.cpp"),
             Object(Matching, "JSystem/JParticle/JPAResourceLoader.cpp"),
diff --git a/src/JSystem/JParticle/JPAFieldBlock.cpp b/src/JSystem/JParticle/JPAFieldBlock.cpp
index 4c5253e2..ed15f1ee 100644
--- a/src/JSystem/JParticle/JPAFieldBlock.cpp
+++ b/src/JSystem/JParticle/JPAFieldBlock.cpp
@@ -137,7 +137,8 @@ void JPAFieldVortex::prepare(JPAEmitterWorkData* work, JPAFieldBlock* block) {
  * calc__14JPAFieldVortexFP18JPAEmitterWorkDataP13JPAFieldBlockP15JPABaseParticle */
 void JPAFieldVortex::calc(JPAEmitterWorkData* work, JPAFieldBlock* block, JPABaseParticle* ptcl) {
     EGG::Vector3f vec;
-    vec = ptcl->mLocalPosition - field_0x10.dot(ptcl->mLocalPosition) * field_0x10;
+    vec = field_0x10.dot(ptcl->mLocalPosition) * field_0x10;
+    vec = ptcl->mLocalPosition - vec;
     f32 mag = vec.squaredLength();
     if (mag > field_0x1c) {
         mag = block->getMagRndm();